* Number of servings is based on daily maintenance dosage for a 1,000 lb horse.

The Ingredients of Weight Gain SupplementsWeight building supplements traditionally contain protein and calorie sources, and may contain certain probiotics for better digestive health, to help your horse gain weight. Some promote muscle development. Combined with a suitable, nutritious diet, and good healthcare, including a comprehensive
deworming program, weight gain supplements may benefit your horse. The components of most equine weight gaining feed additives include:

Protein is found in every organ and tissue of the body. It is vital for muscle development during growth and exercise. Amino acids are the main building blocks of protein.

Fats help increase a feed's energy density, which is the number of calories contained in 100 grams of a particular food. Vegetable oil is the most commonly used fat source in horse feeds.

Probiotics are live microorganisms, including bacteria and yeast, which may promote digestive health in your horse.
The most common probiotics in horse feeds and supplements include Lactobacillus species (bacteria) and Saccharomyces species (yeast), though some products include additional bacterial species.